Accept normal object as 'variableValues' arg of 'graphql' function (#1937)
Accept normal object as 'variableValues' arg of 'graphql' function (#1937)

Synchronise it with same argument of 'execute'
https://github.com/graphql/graphql-js/blob/master/src/execution/execute.js#L102
Plus in most cases result of `JSON.parse` is passed, which is normal
object.
graphql/graphql-js,graphql/graphql-js,graphql/graphql-js